265/45 R21 - Best tyres 2026 - market overview, tests, reviews

265/45 R21 doesn't belong to the most popular dimensions for tyres - there are tyre models available, which can be compared to 325/30 R21, 155/60 R15, 155/65 R13. Let's break down the sizing - 45 is height of the tyre, which is calculated as 45% of the tyre width (265mm), which means the sidewall height has 119.25 mm. The wheel diameter is R21, which means it fits to a 21 inch/533.4mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 255/35 R20(2156.7 mm), 185/55 R15(1836.26 mm), 255/45 R19(2237.13 mm), 185/75 R14(1988.94 mm), 255/60 R18(2397.66 mm), 195/50 R15(1809.56 mm), 265/30 R21(2175.24 mm).